-- Gelatino-bromide of silver paper first announced by Peter Mawdsley, of Liverpool Dry Plate Company. -- "Backgrounds by Powder Process" published by J. Werge, London. -- Flexible supports in carbon printing patented by John Robert Sawyer, of the Autotype Company. -- Leon Lambert's carbon printing process patented. 1875. Demonstrations in carbon printing by L. Lambert given in London and elsewhere. -- Eder and Toth intensified collodion negatives and toned lantern slides with chloride of platinum. 1876. "Practical Treatise on Enamelling and Retouching," by P. Piquepé, Piper and Carter, London. 1877. Ferrous oxalate developer published June 29th. -- Wratten precipitated the gelatine emulsion with alcohol, and so avoided the necessity of dialysing. 1878. Improvement in platinotype patented by W. Willis, junior, July. -- Abney's "Treatise on Photography" published. -- Abney's "Emulsion Process" published. 1879. J. Werge's non-actinic developing tray introduced at the South London Photographic Society. 1880. "Principles and Practice of Photography," by Jabez Hughes, comprising instructions to make and manipulate gelatino dry plates, by J. Werge. London: Simpkin and Marshall, and J. Werge. -- Gelatino-bromide of silver paper introduced by Messrs. Morgan and Kidd. -- Platinotype improvement patent granted. -- Iodides added to gelatino-bromide of silver emulsions by Captain W. de W. Abney. 1880. Warnerke's sensitometer introduced. -- "The Argentic Gelatino-Bromide Workers' Guide," by John Burgess. W. T. Morgan and Co., Greenwich. -- "Photography; its Origin, Progress, and Practice," by J. Werge. London: Simpkin, Marshall, and Co. -- Hydroquinone developer introduced by Dr. Eder and Captain Toth. 1881. Stannotype process introduced by Walter Woodbury. -- Photographers in Great Britain and Ireland 7,614 as per census returns. -- "Modern Dry Plates; or Emulsion Photography," by Dr. J. M. Eder, translated from the German by H. Wilmer, edited by H. B. Pritchard. London: Piper and Carter. -- "Pictorial Effect in Photography," by H. P. Robinson (cheap edition). Piper and Carter. -- "The Art and Practice of Silver Printing," by H. P. Robinson and Captain Abney. Piper and Carter. 1882. Herbert B. Berkeley recommended the use of sulphite of soda with pyrogallic acid to prevent discolouration of film. -- "Recent Advances in Photography" (Cantor Lectures, Society of Arts), Captain Abney. London: Piper and Carter. 1882. "The A B C of Modern Photography," comprising practical instructions for working gelatine dry plates, by W. K. Burton. London: Piper and Carter. 1882. "Elementary Treatise on Photographic Chemistry," by A. Spiller. London: Piper and Carter. 1883. Translation of Captain Pizzighelli and Baron A. Hubl's booklet on "Platinotype;" published in _The Photographic Journal_. -- Orthochromatic dry plates; English patent granted to Tailfer and Clayton, January 8th.